WO2022000484A1 - Conception de signal de réveil pour de multiples sessions de multidiffusion - Google Patents

Conception de signal de réveil pour de multiples sessions de multidiffusion Download PDF

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Publication number
WO2022000484A1
WO2022000484A1 PCT/CN2020/100201 CN2020100201W WO2022000484A1 WO 2022000484 A1 WO2022000484 A1 WO 2022000484A1 CN 2020100201 W CN2020100201 W CN 2020100201W WO 2022000484 A1 WO2022000484 A1 WO 2022000484A1
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WIPO (PCT)
Prior art keywords
wake
multicast
monitor
signal
sessions
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PCT/CN2020/100201
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English (en)
Inventor
Min Huang
Chao Wei
Hao Xu
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Qualcomm Incorporated
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Priority to US17/997,333 priority Critical patent/US20230171699A1/en
Priority to PCT/CN2020/100201 priority patent/WO2022000484A1/fr
Publication of WO2022000484A1 publication Critical patent/WO2022000484A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the following relates generally to wireless communications and more specifically to wake-up signal design for multiple multicast sessions.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • Some wireless communication systems may support multicast services (e.g., a multimedia broadcast multicast service (MBMS) ) .
  • a UE may support multiple multicast sessions where the UE receives information from a base station during multiple time periods or via multiple channels.
  • the UE may receive a wake-up signal associated with each multicast sessions indicating the UE to monitor the multicast sessions.
  • monitoring multiple multicast sessions for wake-up signals may cause the UE to monitor active durations during which the base station does not transmit information to the UE. Accordingly, a UE may inefficiently use resources by monitoring multiple multicast sessions, which may result in increased power consumption.
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support wake-up signal design for multiple multicast sessions.
  • a wake-up signal for a user equipment (UE) that supports multiple multicast sessions, which may include a base station transmitting configuration information to a UE indicating a wake-up signal configuration for one or more multicast sessions.
  • the UE may monitor the one or more multicast sessions for a wake-up signal and receive, prior to an active duration of a multicast session, a wake-up signal from the base station.
  • the wake-up signal may indicate to the UE which of the multicast sessions the UE is to monitor.
  • a method of wireless communications at a UE may include receiving, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE, monitoring, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations, receiving the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor, and determining whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE, monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations, receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor, and determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the apparatus may include means for receiving, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE, monitoring, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations, receiving the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor, and determining whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • a non-transitory computer-readable medium storing code for wireless communications at a UE is described.
  • the code may include instructions executable by a processor to receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE, monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations, receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor, and determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a set of indicators corresponding to the set of multicast sessions in the wake-up signal, where each of the set of indicators corresponds to a respective multicast session of the set of multicast sessions, determining which of the set of multicast sessions to the UE may be to monitor based on the set of indicators, and monitoring the one or more of the set of multicast sessions based on determining which of the set of multicast sessions to the UE may be to monitor.
  • determining whether to monitor one or more of the set of multicast sessions may include operations, features, means, or instructions for determining to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE may be to refrain from monitoring for the downlink control channel of the second multicast session.
  • determining whether to monitor one or more of the set of multicast sessions may include operations, features, means, or instructions for determining to monitor for a downlink control channel during a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE may be to monitor for the downlink control channel of the second multicast session.
  • determining whether to monitor one or more of the set of multicast sessions may include operations, features, means, or instructions for determining to monitor for a second wake-up signal before a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE may be to monitor for the second wake-up signal of the second multicast session.
  • determining whether to monitor one or more of the set of multicast sessions may include operations, features, means, or instructions for determining to monitor for a downlink control channel during the active duration of the first multicast session based on the indication including a first wake-up indicator having a first value indicating that the UE may be to monitor for the downlink control channel of the first multicast session, and determining to monitor a second multicast session of the set of multicast sessions based on the indication including a second wake-up indicator having a second value indicating that the UE may be to monitor for the second multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for monitoring for a second wake-up signal or a second downlink control channel associated with the second multicast session based on determining to monitor the second multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for monitoring all active durations associated with the at least one multicast session during a wake-up cycle of the first multicast session based on the indication.
  • determining whether to monitor one or more of the set of multicast sessions may include operations, features, means, or instructions for refraining from monitoring the one or more of the set of multicast sessions during a wake-up cycle of the first multicast session based on the indication.
  • receiving the wake-up signal may include operations, features, means, or instructions for receiving DCI that includes the wake-up signal, the DCI associated with a wake-up multicast radio network temporary identifier common to all UEs in a cell supported by the base station.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a downlink control message from the base station indicating respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE.
  • the downlink control message may be received via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • RRC signaling DCI
  • MAC-CE medium access control control element
  • receiving the one or more wake-up signal configurations may include operations, features, means, or instructions for receiving a number of multicast sessions in one DCI scrambled with a multicast radio network temporary identifier, a discontinuous reception configuration for the one or more wake-up signal configurations including at least a discontinuous reception cycle and a time offset of respective active durations associated with each of the one or more of the set of multicast sessions, respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE, or any combination thereof.
  • receiving the one or more wake-up signal configurations may include operations, features, means, or instructions for receiving at least one of a number of multicast sessions associated with the set of multicast sessions, a discontinuous reception configuration, or one or more radio network temporary identifiers associated with the set of multicast sessions.
  • receiving the one or more wake-up signal configurations may include operations, features, means, or instructions for receiving the one or more wake-up signal configurations via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • RRC signaling may include operations, features, means, or instructions for receiving the one or more wake-up signal configurations via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • MAC-CE medium access control element
  • receiving the wake-up signal may include operations, features, means, or instructions for receiving the wake-up signal before the active duration of a discontinuous reception cycle associated with the first multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for selecting the first multicast session of the set of multicast sessions for monitoring by the UE based on a length of a discontinuous reception cycle associated with the first multicast session.
  • the length of the discontinuous reception cycle corresponding to a longest length or shortest length of all multicast sessions of the set of multicast sessions.
  • a method of wireless communications at a base station may include identifying a set of multicast sessions configured for a UE, transmitting one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions, determining which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions, and transmitting a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to identify a set of multicast sessions configured for a UE, transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions, determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions, and transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the apparatus may include means for identifying a set of multicast sessions configured for a UE, transmitting one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions, determining which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions, and transmitting a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • a non-transitory computer-readable medium storing code for wireless communications at a base station is described.
  • the code may include instructions executable by a processor to identify a set of multicast sessions configured for a UE, transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions, determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions, and transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • transmitting the wake-up signal may include operations, features, means, or instructions for transmitting a set of indicators corresponding to the set of multicast sessions in the wake-up signal, the set of indicators indicating which of the set of multicast sessions the UE may be to monitor, where each of the set of indicators corresponds to a respective multicast session of the set of multicast sessions, and where each indicator instructs the UE whether to monitor the respective multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the UE may be to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast session, where the wake-up signal includes a wake-up indicator having a value indicating that the UE may be to refrain from monitoring for the downlink control channel of the second multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the UE may be to monitor for a downlink control channel during a second active duration associated with a second multicast session, where the wake-up signal includes a wake-up indicator having a value indicating that the UE may be to monitor for the downlink control channel of the second multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the UE may be to monitor for a second wake-up signal before a second active duration associated with a second multicast session, where the wake-up signal includes a wake-up indicator having a value indicating that the UE may be to monitor for the second wake-up signal of the second multicast session.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the UE may be to monitor for a downlink control channel during the active duration of the first multicast session, where the wake-up signal includes a first wake-up indicator having a first value indicating that the UE may be to monitor for the downlink control channel of the first multicast session, and determining that the UE may be to monitor a second multicast session, where the wake-up signal includes a second wake-up indicator having a second value indicating that the UE may be to monitor the second multicast session.
  • transmitting the one or more wake-up signal configurations may include operations, features, means, or instructions for transmitting a number of multicast sessions in one DCI scrambled with a multicast radio network temporary identifier, a discontinuous reception configuration for the one or more wake-up signal configurations including at least a discontinuous reception cycle and a time offset of respective active durations associated with each of the one or more of the set of multicast sessions, respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE, or any combination thereof.
  • transmitting the one or more wake-up signal configurations may include operations, features, means, or instructions for transmitting at least one of a number of multicast sessions associated with the set of multicast sessions, a discontinuous reception configuration, or one or more radio network temporary identifiers associated with the set of multicast sessions.
  • transmitting the one or more wake-up signal configurations may include operations, features, means, or instructions for transmitting the one or more wake-up signal configurations via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • RRC signaling may include operations, features, means, or instructions for transmitting the one or more wake-up signal configurations via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • MAC-CE medium access control element
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting DCI including the wake-up signal in a wake-up occasion associated with the first multicast session.
  • the DCI may be for a group of UEs including the UE supported by a cell of the base station.
  • the DCI may be scrambled with a wake-up multicast radio network temporary identifier specific to the first multicast session.
  • FIG. 1 illustrates an example of a wireless communications system that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communications system that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of a signal format that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 4A–4B illustrate examples of processing timelines that support wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 5 illustrates an example of a process flow that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIGs. 6 and 7 show block diagrams of devices that support wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 8 shows a block diagram of a communications manager that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 9 shows a diagram of a system including a device that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIGs. 10 and 11 show block diagrams of devices that support wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 12 shows a block diagram of a communications manager that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIG. 13 shows a diagram of a system including a device that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • FIGs. 14 through 18 show flowcharts illustrating methods that support wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • a multicast service may include a point-to-multipoint communication scheme in which information is transmitted simultaneously from a single source (e.g., a base station) to multiple communication devices (e.g., multiple user equipments (UEs) ) . Additionally, a multicast service may refer to a distribution of information among a specific group of communication devices that are subscribed to the multicast service.
  • multicast services may utilize a discontinuous reception (DRX) scheme where a base station may transmit intermittently (e.g., during one or more time periods) . In some cases, the time periods during which the base station transmits information may be referred to as active durations or on durations.
  • DRX discontinuous reception
  • a UE may support multiple multicast sessions where the UE receives information from a base station during multiple time periods (e.g., active durations) or via multiple channels.
  • the UE may receive a wake-up signal prior to each active duration associated with each multicast sessions indicating the UE to monitor the multicast sessions.
  • monitoring multiple multicast sessions for wake-up signals may cause the UE to monitor active durations during which the base station does not transmit information to the UE. Accordingly, the UE may use resources inefficiently by monitoring multiple multicast sessions, resulting in battery loss and increased power consumption.
  • Some techniques for providing a wake-up signal may include a base station transmitting configuration information to a UE indicating a wake-up signal configuration for one or more multicast sessions. Accordingly, the UE may monitor the one or more multicast sessions for a wake-up signal and receive, during a wake-up occasion prior to an active duration of a multicast session, a wake-up signal from the base station.
  • the wake-up signal may include control signaling indicating to the UE which of the multicast sessions the UE is to monitor. For example, the UE may monitor a first multicast session for a wake-up signal based on the configuration information received from the base station.
  • the UE may select one or more multicast sessions to monitor based on a length of a DRX cycle associated with the one or more multicast sessions. Accordingly, the UE may receive a wake-up signal associated with the first multicast session and which includes an indication of a second multicast session the UE is to monitor. In some examples, the UE may receive the indication in a downlink control information (DCI) transmitted by the base station. In some examples, the indication may instruct the UE to monitor an active duration associated with the second multicast session. Additionally or alternatively, the indication may instruct the UE to monitor the second multicast session for a wake-up signal associated with the second multicast session. In some examples, the indication may include an indication that the UE is to not monitor one or more additional multicast sessions. The UE may determine whether to monitor one or more additional multicast sessions based on the indication received from the base station.
  • DCI downlink control information
  • the techniques employed by the described wireless communications systems may provide benefits and enhancements to the operation of the wireless communications system.
  • the described techniques may include features for improving power consumption by enabling UE to selectively monitor multicast sessions.
  • the described techniques include additional features for improving resource use, power consumption, and battery life, among other benefits.
  • aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further described in the context of a signal format, processing timelines, and a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to wake-up signal design for multiple multicast sessions.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable e.g., mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more radio access technologies.
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment) , as shown in FIG. 1.
  • network equipment e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or other suitable terminology.
  • a base transceiver station a radio base station
  • an access point a radio transceiver
  • a NodeB an eNodeB (eNB)
  • eNB eNodeB
  • a next-generation NodeB or a giga-NodeB either of which may be referred to as a gNB
  • gNB giga-NodeB
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) and may be positioned according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
  • the communication links 125 shown in the wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115.
  • Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) .
  • Devices of the wireless communications system 100 e.g., the base stations 105, the UEs 115, or both
  • the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) .
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing ( ⁇ f) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration e.g., the number of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • a control region for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • Each base station 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) .
  • a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) over which the logical communication entity operates.
  • Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station 105.
  • a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas 110, among other examples.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) .
  • a base station 105 may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
  • protocol types e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB)
  • NB-IoT narrowband IoT
  • eMBB enhanced mobile broadband
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) .
  • half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions) .
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT) , mission critical video (MCVideo) , or mission critical data (MCData) .
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) .
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communications, or with both.
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to the network operators IP services 150.
  • the operators IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105) .
  • the wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • SHF super high frequency
  • EHF extremely high frequency
  • the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the base stations 105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions.
  • the techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • the wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.
  • the base stations 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) .
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) , where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 or a UE 115 may use beam sweeping techniques as part of beam forming operations.
  • a base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115.
  • Some signals e.g., synchronization signals, reference signals, beam selection signals, or other control signals
  • the base station 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission.
  • Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the base station 105.
  • a transmitting device such as a base station 105
  • a receiving device such as a UE 115
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
  • transmissions by a device may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station 105 to a UE 115) .
  • the UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands.
  • the base station 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS) ) , which may be precoded or unprecoded.
  • a reference signal e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • the UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) .
  • PMI precoding matrix indicator
  • codebook-based feedback e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • receive configurations e.g., directional listening
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions.
  • receive beamforming weight sets e.g., different directional listening weight sets
  • a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
  • SNR signal-to-noise ratio
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based.
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • the UEs 115 and the base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the wireless communications system 100 may support multicast services (e.g., MBMS) .
  • a multicast service may include a point-to-multipoint or information distribution schemes between one or more base stations 105, one or more UEs 115, or a combination thereof.
  • a multicast service may support a DRX scheme where a UE 115 is awake during one or more active durations associated with the multicast services to monitor for information from the base station 105.
  • a base station 105 may transmit a wake-up signal during a wake-up occasion prior to each active duration of a multicast service associated with the UE 115.
  • a UE 115 may support multiple multicast services or multiple sessions of a multicast service and may monitor each wake-up occasion in each multicast session for a wake-up signal transmitted by a base station 105.
  • a base station 105 may transmit one or more wake-up signal configurations to the UE 115.
  • the UE 115 may monitor a wake-up occasion of a multicast session and receive the wake-up signal from the base station 105.
  • the wake-up signal may include an indication of multicast sessions which the UE 115 is indicated to monitor.
  • the wake-up signal may indicate the UE 115 to monitor a wake-up occasion or an active duration associated with the first or a second multicast session of the UE 115.
  • the wake-up signal may indicate the UE 115 to refrain from monitoring a given multicast session.
  • the UE 115 may determine which multicast sessions to monitor based on the wake-up signal received from the base station 105. Accordingly, the UE 115 may selectively monitor multicast sessions, potentially reducing the number of multicast sessions the UE 115 monitors, which may decrease power consumption at the UE 115.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports wake-up signal design for multiple multicast sessions in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 200 may implement one or more aspects of a wireless communications system 100.
  • the wireless communications system 200 may include a UE 115-a, a UE 115-b, and a UE 115-c which may be examples of a UE 115 as described with reference to FIG. 1.
  • the wireless communications system 200 may also include a base station 105-a which may be an example of a base station 105 as described with reference to FIG. 1.
  • the base station 105-a may be associated with a cell which provides wireless communications service within coverage area 110.
  • the wireless communications system 200 may support multicast services (e.g., MBMS) which may include point-to-multipoint communications or information distribution schemes between a group of communication devices.
  • the base station 105-a may transmit information to the UEs 115-a, 115-b, or 115-c simultaneously.
  • a UE 115 may support multiple multicast services or sessions.
  • Multicast services may utilize a DRX scheme where a UE 115 is awake during certain on or active durations configured for that UE 115 or for a given multicast session for multiple UEs 115, and the base station 105-a transmits information intermittently (e.g., during one or more time periods) .
  • the base station 105-a may transmit a multicast message 225 to one or more of the UEs 115-a, 115-b, or 115-c during an active duration 210 of a first multicast session. Additionally or alternatively, the base station 105-a may transmit a multicast message 225 during an active duration 215 of a second multicast session or during an active duration 220 or a third multicast sessions. Similarly, the base station 105-a may transmit control signaling to one or more of the UEs 115-a, 115-b, or 115-c during one or more of the active durations, 210, 215, or 220.
  • the base station 105-a may transmit a wake-up signal prior to each active duration of a multicast sessions. For example, the base station 105-a may transmit a wake-up signal to one or more of the UEs 115-a, 115-b, or 115-c prior to the active duration 215 indicating the UEs 115 to monitor the active duration 215.
  • the base station 105-a may transmit one or more wake-up signal configurations to one or more of the UEs 115-a, 115-b, or 115-c. For example, the base station 105-a may transmit an indication of one or more wake-up configurations indicating wake-up signal occasions to monitor prior to one or more of the active durations 210, 215, or 220.
  • the one or more wake-up configurations may include a number of multicast sessions scrambled with a wake-up multicast radio network temporary identifier (RNTI) , a DRX configuration including a DRX cycle and a time offset of respective active durations, wake-up multicast radio network temporary identifiers for each multicast sessions, or a combination thereof.
  • the base station 105-a may transmit the indication in a DCI message, RRC signaling, or in a MAC-CE.
  • the UE 115-a may monitor a wake-up occasion prior to one or more of the active durations 210, 215, or 220.
  • the UE 115-a may monitor a wake-up occasion based on a length of a DRX cycle associated with the multicast session. For instance, the UE 115-a may select a multicast session associated with the longest DRX cycle and may choose to monitor the WUS occasions associated with the selected multicast session. Alternatively, the UE 115-a may select a multicast session associated with the shortest DRX cycle so as to be more accurately aware of control channel monitoring for each active duration corresponding to the multicast session.
  • the UE 115-a may receive, during the wake-up occasion, a wake-up signal 230 indicating which multicast sessions to monitor.
  • the wake-up signal 230 may include one or more indicators 235 indicating the UE 115-a to monitor active durations associated with one or more multicast sessions, to monitor additional wake-up signal occasions, or to refrain from monitoring one or more multicast sessions.
  • the wake-up signal 230 may include an indicator 235-a indicating the UE 115-a to monitor the active duration 210 associated with the first multicast session, an indicator 235-b indicating the UE 115-a to monitor a wake-up signal occasion prior to the active duration 215 associated with the second multicast sessions, and an indicator 235-c indicating the UE 115-a to refrain from monitoring the active duration 220.
  • the indicators 235 may be examples of a “wake-up indicator” parameter included in a DCI message, where a value of zero indicates the UE 115 to refrain from monitoring a multicast session, a value of one indicates a UE 115 to monitor an active duration (i.e., monitor for a transmission on a physical downlink control channel) associated with a multicast session, and a value of two indicates a UE 115 to monitor a wake-up occasion associated with a multicast session.
  • the UE 115-a may determine which multicast sessions to monitor based on receiving the wake-up signal 230 from the base station 105-a. Implementing various aspects of the wireless communications system 200 may enable a UE 115 to selectively monitor multicast sessions, thereby improving power consumption and allowing for efficient use of processing resources.
  • FIG. 3 illustrates an example of a signal format 300 that supports wake-up signal design for multiple multicast sessions in accordance with one or more aspects of the present disclosure.
  • the signal format 300 may implement aspects of wireless communications systems 100 or 200.
  • the signal format 300 may be implemented by a base station 105, a UE 115 or any combination thereof, as described with reference to FIGs. 1 and 2.
  • the signal format 300 may be implemented in a DCI message and may be representative of a wake-up signal as described herein.
  • a base station 105 may transmit control signaling using the signal format 300 to indicate to a UE 115 which of a set of multicast sessions to monitor.
  • the control signaling may include a wake-up signal associated with a multicast session.
  • the base station 105 may transmit the wake-up signal in a DCI message.
  • a base station 105 may transmit control signaling that includes an indicator 305 associated with a first multicast session.
  • the indicator 305 may have a value of zero, indicating a UE 115 to refrain from monitoring the first multicast session.
  • the indicator 305 may have a value of one, indicating the UE 115 to monitor an active duration associated with the first multicast session.
  • the indicator 305 may have a value of two, indicating the UE 115 to monitor a wake-up signal occasion associated the first multicast session where the wake-up signal occasion is before an active duration of the first multicast session.
  • the control signaling may include an indicator 310 associated with a second multicast session.
  • the control signaling may include additional indicators associated with additional multicast sessions.
  • the control signaling may include an indicator 315 associated with a multicast session N.
  • Each of indicators 305, 310, through 315 may have a value of zero, one, or two depending on whether the base station 105 requests the UE 115 to monitor a given wake-up occasion or active duration of a multicast session.
  • Implementing one or more aspects of the signal format 300 may enable a base station 105 to indicate to a UE 115 to monitor one or more multicast sessions such that the UE 115 may selectively monitor multicast sessions, potentially reducing the number of sessions monitored by the UE 115.
  • FIG. 4A–B illustrate example processing timelines 400-a and 400-b that support wake-up signal design for multiple multicast sessions in accordance with one or more aspects of the present disclosure.
  • the processing timelines 400-a and 400-b may implement aspects of wireless communications systems 100 or 200, a signal format 300, or any combination thereof.
  • the processing timelines 400-a and 400-b may be implemented by a base station 105, one or more UEs 115, or any combination thereof, as described with reference to FIGs. 1 and 2.
  • the processing timelines 400-a and 400-b may be examples of DRX configurations associated with one or more multicast sessions.
  • a first multicast sessions may be configured with wake-up occasions 405-a, 405-b, and 405-c prior to active durations 410-a, 410-b, and 410-c, respectively.
  • a second multicast session may be configured with wake-up occasions 415-a, 415-b, 415-c, and 415-d prior to active durations 420-a, 420-b, 420-c, and 420-d, respectively.
  • a third multicast session may be configured with wake-up occasions 425-a and 425-b prior to active durations 430-a and 430-b, respectively.
  • the first multicast session have a longer DRX cycle length (e.g., the length between active durations 410) than the second multicast session and a shorter DRX cycle length than the third multicast sessions.
  • the processing timeline 400-a may be indicated to a UE 115 by a base station 105-a via RRC signaling, a DCI message, or a MAC-CE, for example by one or more wake-up signal configurations.
  • UE 115 may monitor the wake-up occasion 405-a for a wake-up signal and may receive the wake-up signal from a base station 105-a.
  • the wake-up signal may include an indication of additional multicast sessions the UE 115 is to monitor.
  • the wake-up signal may include indicators associated with the active duration 410-a associated with the first multicast sessions, the active durations 420-a and 420-b associated with the second multicast session, and the wake-up occasion associated with the third multicast session.
  • the wake-up signal received during the wake-up occasion 405-a may indicate the UE 115 to monitor the active durations 410-a and 420-a, to refrain from monitoring the active duration 420-b, and to monitor the wake-up occasion 425-a.
  • the indicators may be examples of a “wake-up indicator” parameter included in a DCI message, where a value of zero indicates the UE 115 to refrain from monitoring a multicast session, a value of one indicates a UE 115 to monitor an active duration (i.e., monitor for a transmission on a physical downlink control channel) associated with a multicast session, and a value of two indicates a UE 115 to monitor a wake-up occasion associated with a multicast session.
  • a “wake-up indicator” parameter included in a DCI message where a value of zero indicates the UE 115 to refrain from monitoring a multicast session, a value of one indicates a UE 115 to monitor an active duration (i.e., monitor for a transmission on a physical downlink control channel) associated with a multicast session, and a value of two indicates a UE 115 to monitor a wake-up occasion associated with a multicast session.
  • the wake-up signal in wake-up occasion 405-a may indicate information for each of multicast sessions 1, 2, and 3, and may indicate which of the multicast sessions the UE 115 is to monitor during the DRX cycle of multicast session 1. That is, the wake-up signal in wake-up occasion 405-a may indicate information for multicast sessions in which the UE is to monitor between active duration 410-a and active duration 410-b.
  • a UE 115 may monitor each active duration of multicast session 2 that fall within the DRX cycle of multicast session 1 (e.g., the period between active duration 410-a and active duration 410-b) . In some cases, the UE 115 refrain from monitoring wake-up occasion 415-c of multicast session 2 unless it receives another wake-up signal (e.g., in wake-up occasion 425-a or 405-b) indicating that the UE 115 is to monitor multicast session 2.
  • a wake-up signal in wake-up occasion 405-a indicating that the UE 115 is to monitor a multicast session
  • a first multicast sessions may be configured with wake-up occasions 435-a, 435-b, and 435-c prior to active durations 440-a, 440-b, and 440-c, respectively.
  • a second multicast session may be configured with wake-up occasions 445-a, 445-b, 445-c, and 445-d prior to active durations 450-a, 450-b, 450-c, and 450-d, respectively.
  • a third multicast session may be configured with wake-up occasions 455-a and 455-b prior to active durations 460-a and 460-b, respectively.
  • the first multicast session have a longer DRX cycle length than the second multicast session and a shorter DRX cycle length than the third multicast sessions.
  • the processing timeline 400-b may be indicated to a UE 115 by a base station 105-a via RRC signaling, a DCI message, or a MAC-CE.
  • a UE 115 may monitor a wake-up occasion 455-a for a wake-up signal and may receive the wake-up signal from a base station 105.
  • the wake-up signal may include indicators associated with the first and second multicast sessions. For example, the wake-up signal may indicate a UE 115 to monitor the wake-up occasions 435-b and 435-c associated with the first multicast session.
  • the wake-up signal may also indicate the UE 115 to monitor the active durations 450-b and 450-c associated with the second multicast session and the active duration 460-a associated with the third multicast session.
  • the wake-up signal may also indicate the UE 115 to refrain from monitoring the active duration 450-d associated with the second multicast session.
  • the multicast sessions for which the wake-up signal includes indicators may be based on a DRX cycle length associated with the multicast session for the wake-up signal was received. For example, if a UE 115 receives a wake-up signal during the wake-up occasion 405-a, the wake-up signal may include indicators for all wake-up occasions or active durations occurring prior to the wake-up occasion 405-b. In some example, a UE 115 may select a multicast session for monitoring based on the length of the associated DRX cycle. For example, a UE 115 may determine to monitor the third multicast session based on the third multicast session having the longest DRX cycle.
  • the length of a DRX cycle may impact power consumption or resource usage at a UE 115, as well as determine an amount of information the UE 115 receives from a base station 105 regarding additional multicast sessions.
  • Implementing various aspects of the processing timelines 400-aand 400-b may allow a base station 105 to inform a UE 115 of additional multicast sessions via a wake-up signal transmitted on one multicast session. Accordingly, a UE 115 may monitor fewer wake-up occasions, leading to a decreased power consumption at the UE 115.
  • FIG. 5 illustrates an example of a process flow 500 that supports wake-up signal design for multiple multicast sessions in accordance with one or more aspects of the present disclosure.
  • the process flor 500 may implement one or more aspects of wireless communications systems 100 or 200, a signal format 300, a processing timeline 400-a or 400-b, or any combination thereof.
  • the process flow 500 may include a UE 115-b and a base station 105-b which may be examples of the corresponding devices described herein.
  • Alternative examples of the following may be implemented where some processes are performed in a different order than described or not performed at all.
  • processes may include additional features not mentioned below, or further processes may be added.
  • the UE 115-b and the base station 105-b may establish one or more multicast sessions.
  • establishing the multicast sessions may include transmitting configuration information to the UE 115-b, including a DRX profile.
  • the base station 105-b may transmit one or more wake-up signal configurations to the UE 115-b.
  • the wake-up signal configurations may include a number of multicast sessions included in the wake-up signal scrambled with a wake-up multicast radio network temporary identifier, a DRX configuration including a offset of a wake-up signal relative to active durations associated with one or more multicast sessions, or respective wake-up multicast radio network temporary identifiers for each of the one or more multicast sessions.
  • the base station 105-b may transmit the wake-up signal configurations via RRC signaling, in a DCI message, or in a MAC-CE.
  • the UE 115-b may monitor a wake-up occasion prior to an active duration associated with a multicast session. In some examples, the UE 115-b may select a wake-up occasion to monitor based on a length of a DRX cycle of the associated multicast session.
  • the base station 105-b may transmit control signaling including a wake-up signal during a wake-up occasion prior to an active duration associated with a multicast session.
  • the control signaling may include an indication of additional multicast sessions for the UE 115-b to monitor.
  • the control signaling may include an indication that the UE 115-b is to monitor an active duration associated with a first multicast session, to monitor a wake-up occasion associated with a second multicast sessions, and to refrain from monitoring an active duration associated with a third multicast session.
  • the base station 105-b may transmit the control signaling via a DCI message.
  • the UE 115-b may determine which of a set of multicast sessions to monitor based on the control signaling received from the base station 105-b.
  • the UE 115-b and the base station 105-b may perform multicast communications based on the control signaling transmitted by the base station 105-b.
  • the base station 105-b may transmit a multicast message (e.g., on a physical downlink control channel) during an active duration which the UE 115-b is indicated to monitor.
  • a multicast message e.g., on a physical downlink control channel
  • Implementing various aspects of the process flow 500 may allow a UE 115-b to selectively monitor multicast sessions, leading to a decreased power consumption.
  • FIG. 6 shows a block diagram 600 of a device 605 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a UE 115 as described herein.
  • the device 605 may include a receiver 610, a communications manager 615, and a transmitter 620.
  • the device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to wake-up signal design for multiple multicast sessions, etc. ) . Information may be passed on to other components of the device 605.
  • the receiver 610 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE, monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations, receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor, and determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the communications manager 615 may be an example of aspects of the communications manager 910 described herein.
  • the communications manager 615 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 615, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • the communications manager 615 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 615, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 615, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 620 may transmit signals generated by other components of the device 605.
  • the transmitter 620 may be collocated with a receiver 610 in a transceiver module.
  • the transmitter 620 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the transmitter 620 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may be implemented as an integrated circuit or chipset for a mobile device modem, and a receiver 610 and transmitter 620 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more bands.
  • analog components e.g., amplifiers, filters, antennas
  • the communications manager 615 as described may be implemented to realize one or more potential advantages.
  • One implementation may allow the device 605 to receive a wake-up signal including indications of additional multicast sessions to monitor. Based on the techniques for receiving a wake-up signal, the device 605 may support selectively monitoring multicast sessions.
  • the device 605 may reduce the number of multicast sessions that the device 605 monitors and, accordingly, may exhibit a decreased power consumption and increased battery life. In some examples, the device 605 may experience improved reliability and reduced resource usage, among other benefits.
  • FIG. 7 shows a block diagram 700 of a device 705 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the device 705 may be an example of aspects of a device 605, or a UE 115 as described herein.
  • the device 705 may include a receiver 710, a communications manager 715, and a transmitter 735.
  • the device 705 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to wake-up signal design for multiple multicast sessions, etc. ) . Information may be passed on to other components of the device 705.
  • the receiver 710 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the receiver 710 may utilize a single antenna or a set of antennas.
  • the communications manager 715 may be an example of aspects of the communications manager 615 as described herein.
  • the communications manager 715 may include a configuration receiver 720, a wake-up signal receiver 725, and a multicast manager 730.
  • the communications manager 715 may be an example of aspects of the communications manager 910 described herein.
  • the configuration receiver 720 may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE.
  • the wake-up signal receiver 725 may monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations and receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor.
  • the multicast manager 730 may determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the transmitter 735 may transmit signals generated by other components of the device 705.
  • the transmitter 735 may be collocated with a receiver 710 in a transceiver module.
  • the transmitter 735 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the transmitter 735 may utilize a single antenna or a set of antennas.
  • FIG. 8 shows a block diagram 800 of a communications manager 805 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the communications manager 805 may be an example of aspects of a communications manager 615, a communications manager 715, or a communications manager 910 described herein.
  • the communications manager 805 may include a configuration receiver 810, a wake-up signal receiver 815, a multicast manager 820, and a multicast receiver 825. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the configuration receiver 810 may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE.
  • the configuration receiver 810 may receive a number of multicast sessions in one DCI scrambled with a multicast radio network temporary identifier, a discontinuous reception configuration for the one or more wake-up signal configurations including at least a discontinuous reception cycle and a time offset of respective active durations associated with each of the one or more of the set of multicast sessions, respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE, or any combination thereof.
  • the configuration receiver 810 may receive at least one of a number of multicast sessions associated with the set of multicast sessions, a discontinuous reception configuration, or one or more radio network temporary identifiers associated with the set of multicast sessions.
  • the configuration receiver 810 may receive the one or more wake-up signal configurations via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • the configuration receiver 810 may receive a downlink control message from the base station indicating respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE.
  • the wake-up signal receiver 815 may monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations.
  • the wake-up signal receiver 815 may receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor.
  • the wake-up signal receiver 815 may receive a set of indicators corresponding to the set of multicast sessions in the wake-up signal, where each of the set of indicators corresponds to a respective multicast session of the set of multicast sessions.
  • the wake-up signal receiver 815 may monitor for a second wake-up signal or a second downlink control channel associated with the second multicast session based on determining to monitor the second multicast session.
  • the wake-up signal receiver 815 may receive DCI that includes the wake-up signal, the DCI associated with a wake-up multicast radio network temporary identifier common to all UEs in a cell supported by the base station.
  • the wake-up signal receiver 815 may receive the wake-up signal before the active duration of a discontinuous reception cycle associated with the first multicast session.
  • the downlink control message is received via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • RRC signaling DCI
  • MAC-CE medium access control control element
  • the multicast manager 820 may determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the multicast manager 820 may determine which of the set of multicast sessions to the UE is to monitor based on the set of indicators.
  • the multicast manager 820 may determine to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE is to refrain from monitoring for the downlink control channel of the second multicast session.
  • the multicast manager 820 may determine to monitor for a downlink control channel during a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE is to monitor for the downlink control channel of the second multicast session.
  • the multicast manager 820 may determine to monitor for a second wake-up signal before a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE is to monitor for the second wake-up signal of the second multicast session.
  • the multicast manager 820 may determine to monitor for a downlink control channel during the active duration of the first multicast session based on the indication including a first wake-up indicator having a first value indicating that the UE is to monitor for the downlink control channel of the first multicast session.
  • the multicast manager 820 may determine to monitor a second multicast session of the set of multicast sessions based on the indication including a second wake-up indicator having a second value indicating that the UE is to monitor for the second multicast session.
  • the multicast manager 820 may refrain from monitoring the one or more of the set of multicast sessions during a wake-up cycle of the first multicast session based on the indication.
  • the multicast manager 820 may select the first multicast session of the set of multicast sessions for monitoring by the UE based on a length of a discontinuous reception cycle associated with the first multicast session.
  • the length of the discontinuous reception cycle corresponding to a longest length or shortest length of all multicast sessions of the set of multicast sessions.
  • the multicast receiver 825 may monitor the one or more of the set of multicast sessions based on determining which of the set of multicast sessions to the UE is to monitor.
  • the multicast receiver 825 may monitor all active durations associated with the at least one multicast session during a wake-up cycle of the first multicast session based on the indication.
  • FIG. 9 shows a diagram of a system 900 including a device 905 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the device 905 may be an example of or include the components of device 605, device 705, or a UE 115 as described herein.
  • the device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 910, an I/O controller 915, a transceiver 920, an antenna 925, memory 930, and a processor 940. These components may be in electronic communication via one or more buses (e.g., bus 945) .
  • buses e.g., bus 945
  • the communications manager 910 may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE, monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations, receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor, and determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the I/O controller 915 may manage input and output signals for the device 905.
  • the I/O controller 915 may also manage peripherals not integrated into the device 905.
  • the I/O controller 915 may represent a physical connection or port to an external peripheral.
  • the I/O controller 915 may utilize an operating system such as or another known operating system.
  • the I/O controller 915 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 915 may be implemented as part of a processor.
  • a user may interact with the device 905 via the I/O controller 915 or via hardware components controlled by the I/O controller 915.
  • the transceiver 920 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 920 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 920 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 925. However, in some cases the device may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 930 may include RAM and ROM.
  • the memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 930 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the processor 940 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 940 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 940.
  • the processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting wake-up signal design for multiple multicast sessions) .
  • the code 935 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 935 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 935 may not be directly executable by the processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 10 shows a block diagram 1000 of a device 1005 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of aspects of a base station 105 as described herein.
  • the device 1005 may include a receiver 1010, a communications manager 1015, and a transmitter 1020.
  • the device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to wake-up signal design for multiple multicast sessions, etc. ) . Information may be passed on to other components of the device 1005.
  • the receiver 1010 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the receiver 1010 may utilize a single antenna or a set of antennas.
  • the communications manager 1015 may identify a set of multicast sessions configured for a UE, determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions, transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions, and transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the communications manager 1015 may be an example of aspects of the communications manager 1310 described herein.
  • the communications manager 1015 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 1015, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • the communications manager 1015 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 1015, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 1015, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 1020 may transmit signals generated by other components of the device 1005.
  • the transmitter 1020 may be collocated with a receiver 1010 in a transceiver module.
  • the transmitter 1020 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the transmitter 1020 may utilize a single antenna or a set of antennas.
  • FIG. 11 shows a block diagram 1100 of a device 1105 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the device 1105 may be an example of aspects of a device 1005, or a base station 105 as described herein.
  • the device 1105 may include a receiver 1110, a communications manager 1115, and a transmitter 1135.
  • the device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to wake-up signal design for multiple multicast sessions, etc. ) . Information may be passed on to other components of the device 1105.
  • the receiver 1110 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the receiver 1110 may utilize a single antenna or a set of antennas.
  • the communications manager 1115 may be an example of aspects of the communications manager 1015 as described herein.
  • the communications manager 1115 may include a multicast manager 1120, a configuration transmitter 1125, and a wake-up signal transmitter 1130.
  • the communications manager 1115 may be an example of aspects of the communications manager 1310 described herein.
  • the multicast manager 1120 may identify a set of multicast sessions configured for a UE and determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions.
  • the configuration transmitter 1125 may transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions.
  • the wake-up signal transmitter 1130 may transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the transmitter 1135 may transmit signals generated by other components of the device 1105.
  • the transmitter 1135 may be collocated with a receiver 1110 in a transceiver module.
  • the transmitter 1135 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the transmitter 1135 may utilize a single antenna or a set of antennas.
  • FIG. 12 shows a block diagram 1200 of a communications manager 1205 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the communications manager 1205 may be an example of aspects of a communications manager 1015, a communications manager 1115, or a communications manager 1310 described herein.
  • the communications manager 1205 may include a multicast manager 1210, a configuration transmitter 1215, and a wake-up signal transmitter 1220. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the multicast manager 1210 may identify a set of multicast sessions configured for a UE.
  • the multicast manager 1210 may determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions.
  • determining that the UE is to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast session where the wake-up signal includes a wake-up indicator having a value indicating that the UE is to refrain from monitoring for the downlink control channel of the second multicast session.
  • determining that the UE is to monitor for a downlink control channel during a second active duration associated with a second multicast session where the wake-up signal includes a wake-up indicator having a value indicating that the UE is to monitor for the downlink control channel of the second multicast session.
  • determining that the UE is to monitor for a second wake-up signal before a second active duration associated with a second multicast session where the wake-up signal includes a wake-up indicator having a value indicating that the UE is to monitor for the second wake-up signal of the second multicast session.
  • determining that the UE is to monitor for a downlink control channel during the active duration of the first multicast session where the wake-up signal includes a first wake-up indicator having a first value indicating that the UE is to monitor for the downlink control channel of the first multicast session.
  • determining that the UE is to monitor a second multicast session where the wake-up signal includes a second wake-up indicator having a second value indicating that the UE is to monitor the second multicast session.
  • the configuration transmitter 1215 may transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions.
  • the configuration transmitter 1215 may transmit a number of multicast sessions in one DCI scrambled with a multicast radio network temporary identifier, a discontinuous reception configuration for the one or more wake-up signal configurations including at least a discontinuous reception cycle and a time offset of respective active durations associated with each of the one or more of the set of multicast sessions, respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE, or any combination thereof.
  • the configuration transmitter 1215 may transmit at least one of a number of multicast sessions associated with the set of multicast sessions, a discontinuous reception configuration, or one or more radio network temporary identifiers associated with the set of multicast sessions.
  • the configuration transmitter 1215 may transmit the one or more wake-up signal configurations via RRC signaling, DCI, or a medium access control (MAC) control element (MAC-CE) .
  • RRC signaling DCI
  • MAC-CE medium access control control element
  • the wake-up signal transmitter 1220 may transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the wake-up signal transmitter 1220 may transmit a set of indicators corresponding to the set of multicast sessions in the wake-up signal, the set of indicators indicating which of the set of multicast sessions the UE is to monitor, where each of the set of indicators corresponds to a respective multicast session of the set of multicast sessions, and where each indicator instructs the UE whether to monitor the respective multicast session.
  • the wake-up signal transmitter 1220 may transmit DCI including the wake-up signal in a wake-up occasion associated with the first multicast session.
  • the DCI is for a group of UEs including the UE supported by a cell of the base station.
  • the DCI is scrambled with a wake-up multicast radio network temporary identifier specific to the first multicast session.
  • FIG. 13 shows a diagram of a system 1300 including a device 1305 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the device 1305 may be an example of or include the components of device 1005, device 1105, or a base station 105 as described herein.
  • the device 1305 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1310, a network communications manager 1315, a transceiver 1320, an antenna 1325, memory 1330, a processor 1340, and an inter-station communications manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350) .
  • buses e.g., bus 1350
  • the communications manager 1310 may identify a set of multicast sessions configured for a UE, determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions, transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions, and transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the network communications manager 1315 may manage communications with the core network (e.g., via one or more wired backhaul links) .
  • the network communications manager 1315 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the transceiver 1320 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1320 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1320 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 1325. However, in some cases the device may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 1330 may include RAM, ROM, or a combination thereof.
  • the memory 1330 may store computer-readable code 1335 including instructions that, when executed by a processor (e.g., the processor 1340) cause the device to perform various functions described herein.
  • a processor e.g., the processor 1340
  • the memory 1330 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the processor 1340 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 1340 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 1340.
  • the processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting wake-up signal design for multiple multicast sessions) .
  • the inter-station communications manager 1345 may manage communications with other base station 105 and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1345 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1345 may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations 105.
  • the code 1335 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1335 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 14 shows a flowchart illustrating a method 1400 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the operations of method 1400 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1400 may be performed by a communications manager as described with reference to FIGs. 6 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE.
  • the operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed by a configuration receiver as described with reference to FIGs. 6 through 9.
  • the UE may monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations.
  • the operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor.
  • the operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may determine whether to monitor one or more of the set of multicast sessions based on the indication of which of the set of multicast sessions the UE is to monitor.
  • the operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed by a multicast manager as described with reference to FIGs. 6 through 9.
  • FIG. 15 shows a flowchart illustrating a method 1500 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the operations of method 1500 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1500 may be performed by a communications manager as described with reference to FIGs. 6 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE.
  • the operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a configuration receiver as described with reference to FIGs. 6 through 9.
  • the UE may monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations.
  • the operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor.
  • the operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may determine to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE is to refrain from monitoring for the downlink control channel of the second multicast session.
  • the operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a multicast manager as described with reference to FIGs. 6 through 9.
  • FIG. 16 shows a flowchart illustrating a method 1600 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the operations of method 1600 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1600 may be performed by a communications manager as described with reference to FIGs. 6 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE.
  • the operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed by a configuration receiver as described with reference to FIGs. 6 through 9.
  • the UE may monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations.
  • the operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor.
  • the operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may determine to monitor for a downlink control channel during a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE is to monitor for the downlink control channel of the second multicast session.
  • the operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be performed by a multicast manager as described with reference to FIGs. 6 through 9.
  • FIG. 17 shows a flowchart illustrating a method 1700 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the operations of method 1700 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1700 may be performed by a communications manager as described with reference to FIGs. 6 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE.
  • the operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by a configuration receiver as described with reference to FIGs. 6 through 9.
  • the UE may monitor, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast session, for a wake-up signal based on the one or more wake-up signal configurations.
  • the operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may receive the wake-up signal based on the monitoring, the wake-up signal including an indication of which of the set of multicast sessions the UE is to monitor.
  • the operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed by a wake-up signal receiver as described with reference to FIGs. 6 through 9.
  • the UE may determine to monitor for a second wake-up signal before a second active duration associated with a second multicast session based on the indication including a wake-up indicator having a value indicating that the UE is to monitor for the second wake-up signal of the second multicast session.
  • the operations of 1720 may be performed according to the methods described herein. In some examples, aspects of the operations of 1720 may be performed by a multicast manager as described with reference to FIGs. 6 through 9.
  • FIG. 18 shows a flowchart illustrating a method 1800 that supports wake-up signal design for multiple multicast sessions in accordance with aspects of the present disclosure.
  • the operations of method 1800 may be implemented by a base station 105 or its components as described herein.
  • the operations of method 1800 may be performed by a communications manager as described with reference to FIGs. 10 through 13.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.
  • the base station may identify a set of multicast sessions configured for a UE.
  • the operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed by a multicast manager as described with reference to FIGs. 10 through 13.
  • the base station may transmit one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions.
  • the operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1810 may be performed by a configuration transmitter as described with reference to FIGs. 10 through 13.
  • the base station may determine which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions.
  • the operations of 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed by a multicast manager as described with reference to FIGs. 10 through 13.
  • the base station may transmit a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based on the determining.
  • the operations of 1820 may be performed according to the methods described herein. In some examples, aspects of the operations of 1820 may be performed by a wake-up signal transmitter as described with reference to FIGs. 10 through 13.
  • Example 1 A method for wireless communications at a UE, comprising: receiving, from a base station, a configuration indicating one or more wake-up signal configurations associated with a set of multicast sessions configured for the UE; monitoring, during a wake-up occasion of a first multicast session of the set of multicast sessions and before an active duration of the first multicast sessions, for a wake-up signal based at least in part on the one or more wake-up signal configurations; receiving the wake-up signal based at least in part on the monitoring, the wake-up signal comprising an indication of which of the set of multicast sessions the UE is to monitor; and determining whether to monitor one or more of the set of multicast sessions based at least in part on the indication of which of the set of multicast sessions the UE is to monitor.
  • Example 2 The method of example 1, further comprising: receiving a set of indicators corresponding to the set of multicast sessions in the wake-up signal, wherein each of the set of indicators corresponds to a respective multicast session of the set of multicast sessions; determining which of the set of multicast session the UE is to monitor based at least in part on the set of indicators; and monitoring the one or more of the set of multicast sessions based at least in part on determining which of the set of multicast sessions the UE is to monitor.
  • Example 3 The method of any of examples 1 or 2, wherein determining whether to monitor one or more of the set of multicast sessions comprises: determining to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast sessions based at least in part on the indication comprising a wake-up indicator having a value indicating that the UE is to refrain from monitoring for the downlink control channel of the second multicast session.
  • Example 4 The method of any of examples 1 or 2, wherein determining whether to monitor one or more of the set of multicast sessions comprises: determining to monitor for a downlink control channel during a second active duration associated with a second multicast sessions based at least in part on the indication comprising a wake-up indicator having a value indicating that the UE is to monitor for the downlink control channel of the second multicast sessions.
  • Example 5 The method of any of examples 1 or 2, wherein determining whether to monitor one or more of the set o multicast sessions comprises: determining to monitor for a second wake-up signal before a second active duration associated with a second multicast session based at least in part on the indication comprising a wake-up indicator having a value indicating that the UE is to monitor for the second wake-up signal of the second multicast sessions.
  • Example 6 The method of any of examples 1 or 2, wherein determining whether to monitor one or more of the set of multicast sessions comprises: determining to monitor for a downlink control channel during the active duration of the first multicast session based at least in part on the indication comprising a first wake-up indicator having a first value indicating that the UE is to monitor for the downlink control channel of the first multicast session; and determining to monitor a second multicast session of the set of multicast sessions based at least in part on the indication comprising a second wake-up indicator having a second value indicating that the UE is to monitor for the second multicast session.
  • Example 7 The method of example 6, further comprising: monitoring for a second wake-up signal or a second downlink control channel associated with the second multicast session based at least in part on determining to monitor the second multicast session.
  • Example 8 The method of any of examples 1 or 2, wherein the indication instructs the UE to monitor at least one multicast session, the method further comprising: monitoring all active durations associated with the at least one multicast session during a wake-up cycle of the first multicast session based at least in part on the indication.
  • Example 9 The method of any of examples 1 or 2, wherein determining whether to monitor one or more of the set of multicast sessions comprises: refraining from monitoring the one or more of the set of multicast sessions during wake-up cycle of the first multicast session based at least in part on the indication.
  • Example 10 The method of any of examples 1 through 9, wherein receiving the wake-up signal comprises: receiving DCI that includes the wake-up signal, the DCI associated with a wake-up multicast radio network temporary identifier common to all UEs in a cell supported by the base station.
  • Example 11 The method of any of examples 1 through 10, further comprising: receiving a downlink control message from the base station indicating respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE.
  • Example 12 The method of example 11, wherein the downlink control message is received via RRC, DCI, or a MAC-CE.
  • Example 13 The method of any of examples 1 through 12, wherein receiving the one or more wake-up signal configurations comprises: receiving a number of multicast sessions in one DCI scrambled with a multicast radio network temporary identifier, a discontinuous reception configuration for the one or more wake-up signal configurations including at least a discontinuous reception cycle and a time offset of respective active durations associated with each of the one or more of the set of multicast sessions, respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE, or any combination thereof.
  • Example 14 The method of any of examples 1 through 13, wherein receiving the one or more wake-up signal configurations comprises: receiving at least one of a number of multicast sessions associated with the set of multicast sessions, a discontinuous reception configuration, or one or more radio network temporary identifiers associated with the set of multicast sessions.
  • Example 15 The method of any of examples 1 through 14, wherein receiving the one or more wake-up signal configurations comprises: receiving the one or more wake-up signal configurations via RRC, DCI, or a MAC-CE.
  • Example 16 The method of any of examples 1 through 15, wherein receiving the wake-up signal comprises: receiving the wake-up signal before the active duration of a discontinuous reception cycle associated with the first multicast session.
  • Example 17 The method of any of examples 1 through 16 , further comprising: selecting the first multicast session of the set of multicast sessions for monitoring by the UE based at least in part on a length of a discontinuous reception cycle associated with the first multicast session.
  • Example 18 The method of example 17, wherein the length of the discontinuous reception cycle corresponding to a longest length of a shortest length of all multicast sessions of the set of multicast sessions.
  • Example 19 A method for wireless communications at a base station, comprising: identifying a set of multicast sessions configured for a UE; transmitting one or more wake-up signal configurations for the set of multicast sessions to the UE, the one or more wake-up signal configurations indicating respective identifiers for each of the set of multicast sessions; determining which of the set of multicast sessions the UE is to monitor during a wake-up cycle associated with a first multicast session of the set of multicast sessions; and transmitting a wake-up signal before an active duration of the first multicast session, the wake-up signal indicating which of the set of multicast sessions the UE is to monitor during the wake-up cycle associated with the first multicast session of the set of multicast sessions based at least in part on the determining.
  • Example 20 The method of example 19, wherein transmitting the wake-up signal comprises: transmitting a set of indicators corresponding to the set of multicast sessions in the wake-up signal, the set of indicators indicating which of the set of multicast sessions the UE is to monitor, wherein each of the set of indicators corresponds to a respective multicast session of the set of multicast sessions, and wherein each indicator instructs the UE whether to monitor the respective multicast session.
  • Example 21 The method of any of examples 19 or 20, further comprising: determining that the UE is to refrain from monitoring for a downlink control channel during a second active duration associated with a second multicast session, wherein the wake-up signal comprises a wake-up indicator having a value indicating that the UE is to refrain from monitoring for the downlink control channel of the second multicast session.
  • Example 22 The method of any of examples 19 or 20, further comprising: determining that the UE is to monitor for a downlink control channel during a second active duration associated with a second multicast session, wherein the wake-up signal comprises a wake-up indicator having a value indicating that the UE is to monitor for the downlink control channel of the second multicast session.
  • Example 23 The method of any of examples 19 or 20, further comprising: determining that the UE is to monitor for a second wake-up signal before a second active duration associated with a second multicast session, wherein the wake-up signal comprises a wake-up indicator having a value indicating that the UE is to monitor for the second wake-up signal of the second multicast session.
  • Example 24 The method of any of claims 19 or 20, further comprising: determining that the UE is to monitor for a downlink control channel during the active duration of the first multicast session, wherein the wake-up signal comprises a first wake-up indicator having a first value indicating that the UE is to monitor for the downlink control channel of the first multicast session; and determining that the UE is to monitor a second multicast session, wherein the wake-up signal comprises a second wake-up indicator having a second value indicating that the UE is to monitor the second multicast session.
  • Example 25 The method of any of examples 19 through 24, wherein transmitting the one or more wake-up signal configurations comprises: transmitting a number of multicast sessions in one DCI scrambled with a multicast radio network temporary identifier, a discontinuous reception configuration for the one or more wake-up signal configurations including at least a discontinuous reception cycle and a time offset of respective active durations associated with each of the one or more of the set of multicast sessions, respective wake-up multicast radio network temporary identifiers for each of the set of multicast sessions configured for the UE, or any combination thereof.
  • Example 26 The method of any of examples 19 through 25, wherein transmitting the one or more wake-up signal configurations comprises: transmitting at least one of a number of multicast sessions associated with the set of multicast sessions, a discontinuous reception configuration, or one or more radio network temporary identifiers associated with the set of multicast sessions.
  • Example 27 The method of any of examples 19 through 26, wherein transmitting the one or more wake-up signal configurations comprises: transmitting the one or more wake-up signal configurations via RRC, DCI, or a MAC-CE.
  • Example 28 The method of any of examples 19 through 27, further comprising: transmitting DCI including the wake-up signal in a wake-up occasion associated with the first multicast session.
  • Example 29 The method of example 28, wherein the DCI is for a group of UEs including the UE supported by a cell of the base station.
  • Example 30 The method of any of examples 28 or 29, wherein the DCI is scrambled with a wake-up multicast radio network temporary identifier specific to the first multicast session.
  • Example 31 An apparatus for wireless communication comprising at least one means for performing a method of any of examples 1 through 18.
  • Example 32 An apparatus for wireless communication comprising at least one means for performing a method of any of example 19 through 30.
  • Example 33 An apparatus for wireless communications comprising a processor; and memory coupled to the processor, the memory and processor configured to perform a method of any of examples 1 through 18.
  • Example 34 An apparatus for wireless communications comprising a processor; and memory coupled to the processor, the memory and processor configured to perform a method of any of examples 19 through 30.
  • Example 35 A non-transitory computer-readable medium storing code for wireless communication comprising a processor, memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of examples 1 through 18.
  • Example 36 A non-transitory computer-readable medium storing code for wireless communication comprising a processor, memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of examples 19 through 30.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • CPU central processing unit
  • FPGA field-programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special purpose computer.
  • non-transitory computer-readable media may include random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • flash memory compact disk (CD) ROM or other optical disk storage
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer,
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs pour des communications sans fil. Un procédé de fourniture d'un signal de réveil à des équipements utilisateur (UE) qui prennent en charge de multiples sessions de multidiffusion, peut comprendre la transmission par une station de base d'informations de configuration à un UE indiquant une configuration de signal de réveil pour une ou plusieurs sessions de multidiffusion. En conséquence, l'UE peut surveiller la ou les sessions de multidiffusion à la recherche d'un signal de réveil, et recevoir, avant une durée active d'une session de multidiffusion, un signal de réveil en provenance de la station de base. Le signal de réveil peut comprendre une signalisation de commande indiquant à l'UE les sessions à surveiller par l'UE parmi un ensemble de sessions de multidiffusion. L'UE peut déterminer les sessions de multidiffusion à surveiller sur la base de la signalisation de commande reçue.
PCT/CN2020/100201 2020-07-03 2020-07-03 Conception de signal de réveil pour de multiples sessions de multidiffusion WO2022000484A1 (fr)

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CN116806054A (zh) * 2019-04-30 2023-09-26 中兴通讯股份有限公司 无线通信方法和无线网络设备
US20230246946A1 (en) * 2022-01-28 2023-08-03 Comcast Cable Communications, Llc Methods and systems for multicast communication session management

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